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Problem with wipers and ABS/TC warning lights

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  • Problem with wipers and ABS/TC warning lights

    My car has recently developed two separate problems, one of which I'm pretty sure I caused. Let's start with that one.

    My wipers don't stop where they're supposed to, instead they bounce back and end up about an inch or two above their normal resting point. Now I've found some threads elsewhere where similar things happened and the general consensus was the wiper motor being at fault. I doubt this for one reason: they were working fine until, one day, I turned the car on, put on the wipers and then turned the car off while the wipers were still active, and that's when they came to a stop at their current resting place. I've since tried repeating the same process, turning the car off when the blades are down, but it hasn't worked. Would disconnecting the battery help or are there any alternative possibilities to "wiper motor fault"?

    The second one is a ABS/TC warning lights issue. They seem to come on and stay on once in a while. It doesn't happen always, usually when it rains or just after that, so I assume that bad weather has something to do with it. What's the most obvious place I should look for in terms of getting the moisture out, or is there another possibility?

  • #2
    Wipers is almost certainly the wiper motor needing replacing. A very common fault. You could not cause that fault by turning the car off while they were active. All you did was exacerbate the fault which is the system's inability to find the correct "park" position. What you did uncovered the fault, not caused it.

    The ABS/TC is almost certainly a failing brake pedal switch. You could try cleaning it up and sealing it to stop moisture getting in there, but as it's an £8 part it's hardly worth the trouble - just replace it.

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    • #3
      Originally posted by 137699 View Post
      The ABS/TC is almost certainly a failing brake pedal switch.
      Thanks for the clarification! Where is the brake pedal switch, at the brake pedal itself or somewhere else in the car?

      And here's a brief update. Went for a long drive today and things took a turn for the strange. For a while the wipers wouldn't turn off at all, but at the end of the trip they even stopped correctly. They still take a long time to stop working but I guess that's the wiper motor at work there.

      The stranger part is that the warning lights suddenly turned off and the car behaved well, but then it suddenly cut out while standing in traffic. Did this twice, both in the same circumstances - left in drive and standing still in traffic. Could this be brake related as well, only now instead of the warning lights it's messing with the engine?

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      • #4
        Play up again SAM?

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        • #5
          Sounds like a full diagnosis session needed here. Either you have 3 faults (with the cutting out) or you may have SAM issues.

          Two things to check out...

          1. Smart Technic - smart specialist in Birmingham
          2. www.theroadster.net - a better forum for your roadster-related questions.

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